the production, distribution, and consumption of information are the most important development indices of any nation. plenty of opportunities were created by e-learning which have overall paved the grounds for and enriched the presentation of learning materials through advanced audiovisual educational facilities. such learning environments are by and large flexible and provide more appropriate...

this study aimed at examining the major mobile wireless technologies, that is,mobile phones and the possibilities associated with them, currently in use in theeducational domains, with an emphasis on language teaching and learning practices.accordingly, some of the most typical studies using different functions of mobilephones such as e-mail, multimedia capabilities, wireless application protoc...

This paper extends the work of [2] to a mobile environment. In that work, the equilibrium buffer fill distribution is described by a set of differential equations assuming sources alternate asynchronously between exponentially distributed periods in “on” and “off” states. This paper extends that work by including the probabilities that mobile sources have links to that buffer. The sources repre...

This paper presents multiple moving speaker tracking using an 8ch microphone array system installed on a mobile robot. We use a set of Kalman filters with different history lengths in order to track non-linear movements of multiple speakers. For quantitative evaluation of the tracking, motion references of sound sources and a mobile robot, called SIG2, were measured accurately by ultrasonic 3D ...

The seamless retrieval of information distributed across networks has been one of the key goals of many systems. Early solutions involved the use of single static agents which would retrieve the unfiltered data and then process it. However, this was deemed costly and inefficient in terms of the bandwidth since complete files need to be downloaded when only a single value is often all that is re...

BACKGROUND Internet and mobile health (mHealth) apps hold promise for expanding the reach of evidence-based health interventions. Research in this area is rapidly expanding. However, these studies may experience problems with recruitment and retention. Web-based and mHealth studies are in need of a wide-reaching and low-cost method of recruitment that will also effectively retain participants f...

The recent availability of large-scale call detail record data has substantially improved our ability of quantifying human travel patterns with broad applications in epidemiology. Notwithstanding a number of successful case studies, previous works have shown that using different mobility data sources, such as mobile phone data or census surveys, to parametrize infectious disease models can gene...

Mobile robots in real-life settings would benefit from being able to localize and track sound sources. Such a capability can help localizing a person or an interesting event in the environment, and also provides enhanced processing for other capabilities such as speech recognition. To give this capability to a robot, the challenge is not only to localize simultaneous sound sources, but to track...

”Aurally Informed Performance’ for mobile robots operating in natural environments brings difficult challenges, such as: localizing sound sources all around the robot; tracking these sources as they or the robot move; separate the sources as a pre-processing step for recognition and processing, in real-time; dialogue management and interaction in crowded conditions; evaluating performances of t...